JPS62112274A - Disk driving device - Google Patents

Abstract

PURPOSE:To obtain the sufficient feeding accuracy even with a manual operation by shifting intermittently a carriage by the prescribed quantity only along a guide means by a shifting means when a driving member is turned from the outside of a device, stopping a recording and reproducing head at a prescribed recording track and executing the recording and reproducing. CONSTITUTION:Three carriages 4 are supported between guide bars 6 and 5, the reference surface is specified and by a spring 11 inserted into the guide bar 6, a roller 12 is abutted with the cam surface 13 of a cam 7. For a dial 8, a part is exposed from an enclosure 14, fitted to the same shaft as the cam 7, when it gets over the border of the cam surface 13 by the action of the cam surface 13, the roller 12 and the spring 11, the clock feeling is obtained, and one click corresponds to one track. For example, the first page is stored into the first track and the second page is stored into the second track, when the document is called, the disk cartridge is inserted from an inserting port 16, loading is executed on a turn table 1, and thereafter, the dial 8 is turned manually and the desired number of the track is confirmed and reproduced by a display window 21.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a disk drive device for recording and reproducing information by rotationally driving an information recording medium such as a magnetic disk formed in a disk shape, and particularly relates to The present invention relates to a disk drive device intended for recording and reproducing by manually transporting a carriage.

[Conventional technology]

Recently, small portable word processors have started to become popular, but since those with large storage capacities are very expensive, they generally have small storage capacities. However, if the frequency of document creation increases or long documents such as research reports are created, it may not be possible to do so, and even if an external storage device is purchased separately, the cost of the storage device is high or the interface The desired storage device may not be available.

For example, if we consider a 3.5-inch flexible disk with 40 tracks per side, a storage capacity of 250 bytes, and one A4-sized document, 40 characters and 60 lines, 24
It is only necessary to be able to memorize 00 characters, and for this purpose, a capacity of about 5 to 1000 characters is required. Then, in the case of this flexible disk, the capacity of one track is 6.25K.
Since it is a byte, one entire page of an A4 document can be stored in one track. Therefore, if one document is stored in one track, the next document can be stored in the next track, and only the necessary documents can be stored.
If it is set to be stored page by page, the required document can be read out simply by selecting the page number (1-rack position) of the document. In other words, in a simple word processor such as the one mentioned above, if it can store letters, documents, etc. that you want to keep as is, it can be used for most purposes even if it does not have a random access function.

On the other hand, when recording and reproducing a disk-shaped magnetic recording medium (hereinafter referred to as a disk), the track width of the recording track is extremely small, so the carriage is usually controlled electrically to move the recording medium. The reproducing head (in this case, the magnetic head since it is used for a magnetic recording medium) is positioned at a predetermined track position.

As this transfer device, a device in which a rotating shaft having a helical groove formed on its outer periphery is driven by a stepping motor, and is configured to be able to transfer by a predetermined track pitch depending on the rotation angle of the stepping motor is often adopted. However, this device is expensive and may not require such precision depending on the application. For example, there is a device disclosed in Japanese Utility Model Publication No. 52-15208 that does not require precision. The main part of this invention is shown in FIG. This invention relates to a device for manually moving a magnetic head to an arbitrary position in a magnetic recording/reproducing apparatus that performs recording or reproduction while forming a spiral track on a magnetic sheet. As shown in the figure, a guide attached to the lower end of a vertical rod 37 extending vertically from a support substrate 33 that supports a magnetic head 32 is attached to a spiral guide path 31 formed, for example, in a groove shape on the upper surface of a guide plate 30. The pieces 38 are fitted and guided. The fitting of the guide piece 38 into the guide path 31 is operated via a guide piece removal operation lever 39, so that the magnetic head 32 can be manually moved to a predetermined track position.

[Problem that the invention seeks to solve]

By the way, in the above conventional example, since the spiral track is used as the forebank, the guide path 31 is formed in a spiral shape, and the track is selected relatively roughly. Therefore, the selection mechanism by fitting the guide pieces 38 does not require much precision, and moreover, the selection mechanism by fitting the guide pieces 38
Lifting up and fitting it into the predetermined guide path 31 is as follows:
When the track density becomes small, it is considered to be extremely difficult and difficult to operate. In particular, this device
．． Application to recording and reproduction of flexible disks formed with track densities of 5TPI and 135TPI is as follows.
b.It seems almost impossible.

From this point of view, the present invention allows manual control of 135TPI.
The object of the present invention is to provide a disk drive device that can ensure sufficient feeding accuracy for feeding.

[Means for solving problems]

In order to achieve the above object, the present invention provides a disk drive device that performs recording and reproduction using a disk cartridge containing a disk-shaped information recording medium, including a rotating means for rotationally driving the information recording medium, and a rotating means for rotationally driving the information recording medium; a carriage on which a reproducing head is mounted; a guide means for guiding the carriage in the radial direction of the information recording medium; It has a configuration that includes a transfer means for transferring along the guide means and a drive member for manually driving the transfer means.

[Effect]

According to the above means, when the drive member is rotated from outside the device,
The driving member causes the transport means to intermittently transport the carriage by a predetermined distance along the guide means, and the recording/reproducing head mounted on the carriage stops at a predetermined recording track to perform recording/reproduction. . For example, when the drive member is rotated by one click, the carriage moves by one click.
By making a correspondence so that the track is transferred, a predetermined track can be manually selected.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

1 to 4 are for explaining the first embodiment. FIG. 1 is a schematic diagram showing the internal mechanism of a disk drive device according to this embodiment, and FIG. 2 is an external appearance of the disk drive device. FIG. 3 is a perspective view showing the external appearance of a word processor incorporating a disk drive device, and FIG. 4 is a characteristic diagram showing the characteristics of the cam.

In FIG. 1, this disk drive device includes a spindle motor 2 that rotationally drives a turntable 1 on which a disk is placed, a carriage 4 on which a magnetic head 3 is mounted,
Two guide rods 5 and 6 that guide the carriage 4 in the radial direction of the disk, and a cam 7 that transports the carriage 4.
and a disc-shaped dial 8 as a driving member for driving the cam 7.

The turntable 1 is provided so as to rotate coaxially and integrally with a flywheel (not shown) on the lower surface side, and is driven by a spindle motor 2 via a belt 9. Further, a predetermined disk is placed on the upper surface of the turntable 1, and the rotation of the turntable 1 can be reliably transmitted by gripping the disk.

The carriage 4 has a magnetic head 3 attached to its lower surface, and during recording and reproduction, an arm 10 attached to the right end of the carriage 4 in the figure so as to be rotatable by a predetermined amount descends, and an arm 10 attached to the end thereof is attached. The disc can be held between the two pads. Moreover, this carriage 4 is
In the figure, it is supported at three points between the lower guide rod 6 and the upper guide rod 5, and its reference plane is defined. A spring 11 is inserted into this lower guide rod 6 to constantly bias the carriage 4 in the direction of the turntable 1.
A roller 12 provided on the turntable 1 side of the carriage 4 is pressed against the cam surface 13 of the cam 7.

This cam 7 has concave stepped cam surfaces 13 with step portions 13a on the circumferential surface formed in a number corresponding to the number of tracks (for example, 40 for 40 tracks), and the circumferential surface curves the vortex. This is a publicly known method.

As shown in FIG. 4, this cam 7 is designed so that the relationship between the rotation angle and the displacement changes stepwise (intermittently), and the rotation of a dial 8 that rotates integrally with this cam 7 Even if there is some error, this error can be absorbed and the magnetic head can be aligned with the desired track position.

The dial 8 is partially exposed from the housing 14 and is attached coaxially with the cam 7. For example, a rotary encoder 1 is placed on the outer periphery of this dial 8.
5 is configured to roll, and the rotation angle of the dial 8 is detected to detect the track position where the magnetic head 3 is located. This dial 8 is operated by the action of the cam surface 13 of the cam 7, the roller 12, and the spring 11.
Care has been taken to provide a click feeling when the cam surface 13 crosses the boundary, and one click corresponds to one track. In addition, the cartridge insertion slot 16 of the housing 14
A disk-in switch 17 and a write protect switch 18 are provided on the side.

This disk drive device has a housing 1 as shown in FIG.
A cartridge insertion opening 16 is formed on the front surface of the cartridge insertion opening 4, and a dial 8 is exposed from a dial operation window 19 below the cartridge insertion opening 16. The push button exposed on the right side of the dial 8 in the figure is an eject button 20, and by pushing the eject button 20, the cartridge can be ejected from the apparatus. Further, on the right side of the dial 8, a display window 21 is provided that displays the number of tracks on which the magnetic head 3 is located in accordance with track information detected from the rotary encoder. The protrusion exposed on the right side of the housing is the power switch 22 of the disk drive device.

An example in which this is integrated into the word processor 23 is shown in FIG. The disk drive device is provided on the right side of the word processor 23, and a cartridge insertion slot 16, a dial 8, and an eject button 20 are provided at predetermined positions on the right side, and a display window that displays the number of tracks is provided on the top surface. 21 are provided.

When the disk drive device is configured as described above, for example, the first page of a document is placed on the first track, the second page is placed on the second track, the nth page is placed on the nth track, and so on. If so, A4 size is 40
Pages can be stored. When calling up this document, insert the disc cartridge through the cartridge insertion slot 16, load it onto the turntable 1, turn the dial 8 by hand, and confirm the desired number of tracks in the display window 21. and can be played.

In this case, additions, deletions, and corrections can be made freely within the scope of one page.

Next, a second embodiment is shown in FIGS. 5 to 7. In this example, the cam 7 is replaced with an intermittent feed screw to enable the same operation.
The idea proposed in Section 4 is applied.

As shown in the enlarged view of the sixth fixed part, the intermittent feed screw 26 extends over a predetermined range of the outer periphery of the screw shaft 24 and is parallel to the vertical axis 5Y perpendicular to the axis X thereof.
In other words, the advance angle 0 is O' (note that this advance angle O does not need to be 0'', but can be as long as it is a small angle), and the groove bottom is approximately straight (straight or pseudo-linear, A plurality of grooves G (see Fig. 7) are provided along the circumferential direction,
These grooves G are successively arranged in a sequentially shifted state in the axial direction so that the inside of each groove G communicates with each other, and as a result, these grooves G constitute one intermittent feed screw 26.
4a is formed. The engagement element 25 of the carriage 4 is pressed against this spiral groove 24a by the elastic force of the leaf spring.
A pointed end 25a serving as an engagement piece is fitted and engaged.

In the above embodiment, as shown in FIG. 7, eight grooves G are formed at equal intervals in one circumference (360') of the screw shaft 24.
rotation angles of 0', 45', and 90'.

135°, 180', 225°, 270°.

Stop positions of the carriage 4 are set corresponding to eight locations of 315°. As a result, characteristics similar to those shown in FIG. 4 are exhibited.

A schematic diagram of a disk drive device using this intermittent feed screw 26 is shown in FIG. In FIG. 5, one of the guide rods 5 is replaced with a screw shaft 24 that has the spiral groove 24a formed on its outer periphery and constitutes an intermittent feed screw 26, and a gear 24b is provided at the end of the cartridge insertion example 016. It is being

Then, the cam 7 is removed and the gear 2 is attached to the end face of the dial 8.
A gear 8a that meshes with the gear 4b is provided.

In this embodiment, high void gears are employed as the gears 24b and 8a. These gears 24b and 3a are appropriately selected depending on the relative positional relationship between the screw shaft 24 and the dial 8. Furthermore, a concave surface 8b is continuously formed on the outer periphery of the dial 8 so that a click operation can be performed in correspondence with the transfer pitch of one track of the carriage 4, and a roller 2 that functions as an encoder.
7 is rotatably pressed against the concave surface 8b of the dial 8 by a temporary spring 27a. This makes it possible to perform the above-mentioned click operation and also count the number of tracks.

The carriage 4 is provided with the engaging element 25 formed of a plate spring, and a pointed end 25a protruding from the engaging element 25.
is fitted into the helical groove 24a constituting the intermittent feed screw 26 so as not to come off due to the elastic force of the leaf spring. Other parts that are not particularly explained are configured in the same manner as in the first embodiment.

In the case of this second embodiment, when the dial 8 is rotated after the disc cartridge is inserted through the cartridge insertion port 16 and the disc is loaded onto the turntable, the screw shaft 24 is moved to the gears 3a, which engage with each other. 24b and the above-mentioned click mechanism,
The magnetic head 3 is moved one track at a time for each click.
By checking the number of tracks on the display window 21, it becomes possible to write or read a desired document.

As described above, both the first embodiment and the second embodiment can provide a disk drive device that can function satisfactorily manually without using an expensive stepping motor. Further, by employing a known intermittent feed mechanism, the track feed accuracy can be maintained at a level sufficient for practical use, and the off-track problem can also be avoided. Furthermore, since documents can be saved according to the number of tracks, documents can be easily saved and organized by associating predetermined tracks with documents. By applying this disk drive to a simple word processor, it is expected that the same type of word processor will be improved.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, which allows a desired track to be manually selected, it is possible to provide a disk drive device that is low in cost and has sufficient feeding accuracy even when manually operated. .

[Brief explanation of drawings]

1 to 7 are for explaining the present invention in detail, FIG. 1 is a schematic diagram of a disk drive device according to a first embodiment, FIG. 2 is a perspective view showing its appearance, 3 is a perspective view showing the external appearance of a word processor incorporating a disk drive device, FIG. 4 is a characteristic diagram of an intermittent feed mechanism, FIG. 5 is a schematic diagram of a disk drive device according to the second embodiment, and FIG.
The figure is an enlarged view of the main part of a screw shaft in which an intermittent feed screw is formed, FIG. 7 is a side view thereof, and FIG. 8 is a sectional view of the main part showing a conventional example. 1...Turntable, 2...Spindle morph,
3...Magnetic head, 4...Carriage, 5.6...
・Guide rod, 7...cam, 8...dial, 9...
・Belt, 11...Spring, 12...Roller, 13.
...Cam surface, 13a...Step part, 24...Screw shaft, 25...Engager, 25a...Point part, 2
6...Intermittent feed screw. ,・・−,−・・ ;・ Figure 1, Figure 2, Figure 3, Figure 4, rotation angle, Figure 5, Figure 6, and '+Q,'/

Claims (3)

[Claims] (1) In a disk drive device for recording and reproducing information by introducing a disk cartridge containing a disk-shaped information recording medium into the device, a rotating means for rotationally driving the information recording medium and a recording and reproducing head are provided. a carriage on which is mounted; a guide means for guiding the carriage in the radial direction of the information recording medium; What is claimed is: 1. A disk drive device comprising: a transport means for transporting the transport along the road; and a drive member for manually driving the transport means. (2) In the description of claim (1), the transporting means includes a cam including a cam surface in which a number of consecutive steps equal to the number of tracks of the information recording medium are formed; A disk drive device comprising: a roller provided on a carriage so as to be able to roll on a stepped portion; and an urging means for pressing the roller toward the stepped portion of a cam. (3) In the statement of claim (1), the transfer means protrudes from an intermittent feed screw formed on the outer periphery of the rotating shaft and a carriage that can be engaged with a thread groove of the intermittent feed screw. What is claimed is: 1. A disk drive device comprising: an engaging piece;